While this book is a bit slow to start, once it gets going it catches you. There were twists that I didn't expect (really Claire??? you did WHAT?) and when it fell together, I was floored. At first it seemed that we didn't need all the POVs, but once the climax started building, it made sense why we had them from the beginning

SPOILERS: 
I do have a few complaints. The first is that we don't see what happens the Uriel and where Ramiel ends up. The second is: where the hell is God? I realize that is probably going to be explored in the rest of the series, but it felt like the one loose end.